Please I need Help on the following issue: I just added a new metadata schema in dspace 1.6 called "ar", my question is: how I can submit my articles or projects using this new metadata schema not the default one "dc" metadata schema? in other term: does dspace 1.6 allow the end-users to switch the submission of the items between 2 metadata schema "ar" & "dc"? please advise and thank you in advance.